Broadband chaotic optical transmitter based on integrated external cavity semiconductor laser

Abstract

A broadband chaotic light emitter based on an integrated external-cavity semiconductor laser unit comprises the integrated external-cavity semiconductor laser unit, a three-port optical circulator and an optical coupler, wherein the port 2 of the three-port optical circulator is connected with the integrated external-cavity semiconductor laser unit and used for receiving an optical signal of a feedback circuit and then transmitting the optical signal to the integrated external-cavity semiconductor laser unit, meanwhile receiving the optical signal produced by the integrated external-cavity semiconductor laser unit and then sending the optical signal to the feedback circuit and ensuring optical signal single-line transmission in the feedback circuit, the port 1 of the optical coupler is connected with the output port 3 of the three-port optical circulator and used for sending a part of optical signals output by the integrated external-cavity semiconductor laser unit through the three-port optical circulator to the feedback circuit at preset power and outputting the other part of optical signals, the port 2 of the optical coupler is connected with the port 1 of the three-port optical circulator to form a feedback circuit, and the port 3 of the optical coupler is a chaotic light signal output port.

Description

technical field [0001] The invention relates to the technical field of chaotic light emitters, in particular to a broadband chaotic light emitter based on an integrated external cavity semiconductor laser. Background technique [0002] With the rapid development of Internet technology and the sharp increase in the number of network users, the Internet has become the main platform for people to transmit information. The confidentiality of the network has become a focus of attention in recent years. A safe and reliable communication network is closely related to national defense security, corporate and personal privacy. At present, the software encryption technology based on the public key is widely used. However, with the improvement of computer computing power, the security of this encryption technology has been severely tested. It is very important to build a more reliable secure communication system by replacing the existing algorithm encryption technology with the encry...

AI Technical Summary

Problems solved by technology

However, the bandwidth of the chaotic signal generated by the integrated chip is limited by the relaxation oscillation frequency of the laser, generally below 10 GHz, and the range of the chaotic working state generated is very small, which directly affects its application in high-speed chaotic communication and high-speed random number generation.

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